HELIX. 13 



H. CARIOSULA, Mich. PI. 2, figs. 51, 52. 



Subimperforate, carinate, globosely convex above, carious, 

 somewhat flattened below, soiled white, with a tubercularly 

 eroded filiform sutnral carina ; whorls 5, somewhat flattened ; 

 upper margin of aperture subdeflected. Diam. 18 mill. 



Algiers. 

 H. MAYRANI, Gassies. PI. 2, figs. 53-55. 



Imperforate, carinate, granulately crispate under the rusty 

 epidermis, flatter below, flesh white, with a filiform peripheral 

 carina, evanescent in front ; whorls 5-6, convex, the last with 

 radiating striae above, suture profound. Diam. 19-20 mill. 



A Igiers. 

 Yar. SUBCARIOSULA, Bourg. Fig. 55. 



Granulations stronger, base less swollen, keel sharper. 

 H. Kobeltiana, Debeaux, is a synonym. 



Yar. DEBEAUXI, Kobelt. 



Globosely trochoidal, calcareous, soiled white ; whorls very 

 distinctly crenated at the suture, tuberculosely rugose, the last 

 whorl obsolete^ angulated, smoother and shining below, base 

 convex, excavated around the umbilical region. 



II. OCTINILLA, Bourg. 



Umbilicus covered or rimate, turbinately convex above, 

 ptanulate below, whitish, strongty rugose above ; whorls 5J, 

 strongly tuberculate at the suture, carinate below, the last 

 compressedly carinate, the base subtumid, radiately plicately 

 striate. Diam. 17-22 mill, alt. 10-12 mill. 



Or an, Algiers. 



Unfigured. 



H. cariosula, var. vetula, Westerl., is a synonym. 



H. CARIOSA, Olivier. PI. 2, figs. 56-59. 



Umbilicated, carinated, convex, white, rough, crispately 

 rugulose ; whorls 5, the last scarcely deflected in front, angu- 

 lated around the wide, deep umbilicus. Diam. 18 mill. 



Syria. 

 Yar. XAZARENSIS, Mouss. 



Half bullet-shaped, swollen, the last whorl angulated only at 

 the periphery, upper surface thickly grained. 



